The class-book of anatomy : designed for schools, explanatory of the first principles of human mechanism, as the basis of physical education . This is an accurate drawing of oneof the bones of the spine, at theneck : a, is the body of the bone ;b, the spinous process, or handle,which gives the name of spine tothe whole column; c,c, the trans-verse processes, to which the muscles adhere, producing motion ; d,d, round holes through the arms ofthe bone, for safely lodging an ar-tery, which carries blood to thebrain; e, e, the upper, and/./,the under surfaces, which make a joint with the blocks ab
The class-book of anatomy : designed for schools, explanatory of the first principles of human mechanism, as the basis of physical education . This is an accurate drawing of oneof the bones of the spine, at theneck : a, is the body of the bone ;b, the spinous process, or handle,which gives the name of spine tothe whole column; c,c, the trans-verse processes, to which the muscles adhere, producing motion ; d,d, round holes through the arms ofthe bone, for safely lodging an ar-tery, which carries blood to thebrain; e, e, the upper, and/./,the under surfaces, which make a joint with the blocks above and be-low it; g, the hole through which the spinal marrow, or pith of theback, passes, in safety from the head, through the whole chain oftwenty-four vertebrae. A person becomes round shouldered, as the expressionis, in consequence of the elasticity of the front edge ofthese pads being overcome. A permanent stoop or bendof the back is the result. Old age, also graduallyweakens the elastic power, and therefore aged men areoften crooked, infirm and shorter, than in their of the body, producing deformity, are refera-. ANATOMICAL CLASS BOOK. 21 ble to the want of spring, or proper elasticity in thesecushions. The topmost of all the bones of the spine, is called theatlas, because it supports the head, as Atlas was fabled tosupport the globe. It is a ring of bone, without a body,which distinguishes it from all below it. With the skull,it forms a joint, allowing the head to move forward andbackward, but in no other manner. Joining the atlas, is the dented us, or tooth-like bone,having its name from the resemblance which a particularportion of it bears to a tooth. In a full grown man, theprocess is about half an inch high, above the body of the|)0nC) — and smooth, jutting up into the atlas. Aroundthispi\rt)t, the head rolls. If, by any sudden jerk, the headis thrown too violently back or forward, the dentatus maybe forced from its place, — which would be a di
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Keywords: ., bookcentury1800, bookdecade1830, booksubjectanatomy, bookyear1834
